<!DOCTYPE html>
<html lan="en">
	<head>
		<title>fangda</title>
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
		<style>
		#copycanvas {
           border: 1px solid #000;
		   display: none;
        }
		#square {
			width: 90px;
			height: 90px;
			background-color: #cc3;
			border: 1px solid #f00;
			opacity: 0.5;
			position: absolute;
			z-index: 999;
			display: none;
			cursor: crosshair;
		}
		</style>
	</head>
	<body>
		<canvas id="canvas" width="500" height="300"></canvas>
		<canvas id="copycanvas" width="300" height="300"></canvas>
		<div id="square"></div>
		<script src="camp.js"></script>
	</body>
</html>